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A186672 Total number of n-digit numbers requiring 13 positive biquadrates in their representation as sum of biquadrates. 18
0, 6, 60, 640, 6239, 60228, 600196, 6000213, 60000231, 600000239, 6000000240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A102831(n) + A186650(n) + A186652(n) + A186654(n) + A186656(n) + A186658(n) + A186660(n) + A186662(n) + A186664(n) + A186666(n) + A186668(n) + A186670(n) + a(n) + A186674(n) + A186676(n) + A186678(n) + A186681(n) + A186683(n) + A186685(n) = A052268(n), for n>1.

LINKS

Table of n, a(n) for n=1..11.

Eric Weisstein's World of Mathematics, Waring's Problem.

FORMULA

a(n) = A186671(n) - A186671(n-1).

CROSSREFS

Cf. A046044, A186671.

Sequence in context: A186676 A322441 A186674 * A295503 A106259 A085364

Adjacent sequences:  A186669 A186670 A186671 * A186673 A186674 A186675

KEYWORD

nonn,base,more

AUTHOR

Martin Renner, Feb 25 2011

EXTENSIONS

a(5)-a(11) from Giovanni Resta, Apr 29 2016

STATUS

approved

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Last modified October 21 21:51 EDT 2021. Contains 348155 sequences. (Running on oeis4.)